Swap the filter cartridge at a Keyes home, every three months (2026-07-19)

A certified filter only protects a household if its cartridge gets changed on schedule. This recurring visit keeps an already-installed Keyes filter working at full capacity. Standard: Manufacturer NSF-certified cartridge replacement interval + SDG 6 Clean Water and Sanitation Proof: Photo of old cartridge removed and new cartridge installed with dated label Method (Manufacturer NSF-certified cartridge replacement interval + SDG 6 Clean Water and Sanitation): 1. Confirm the household invited this visit. 2. Shut off the water supply to the filter housing. 3. Remove the old cartridge and photograph its condition. 4. Install a new certified replacement cartridge and reseal the housing. 5. Restore water flow and run it for two minutes, checking for leaks. 6. Photograph the new cartridge's install date on the housing label. Done when: Photo of old cartridge removed and new cartridge installed with dated label

Where

Invited home, unincorporated Keyes, Stanislaus County, CA 95328

Pay

$144 proposed

This packet is not funded yet, so this figure is a proposed price and not money waiting in escrow. If a buyer funds it, approved proof settles that price onchain. If nobody funds it, approved proof earns provable credit toward the work instead of cash. You see which before you claim, never after.

Proof

Photo of old cartridge removed and new cartridge installed with dated label

This is exactly what gets it approved. Nothing settles without it.

Level

entry

Open until

2026-10-19

How this work is done

A documented method, so this packet comes out the same whoever does it. Typically 30–60 minutes. Method of record: EPA drinking-water sampling (3Ts / LCR first-draw where lead is in scope)

Bring

• GPS-capable phone
• test kit for each named analyte (nitrate/coliform/arsenic/lead as specified)
• clean sample bottle + label
• nitrile gloves
• camera

Steps

1. 1. Navigate to the sampling point; confirm GPS is inside the posting radius; record the waypoint.
2. 2. Photograph the tap or wellhead with a legible timestamp.
3. 3. If first-draw is required, sample after >=6h stagnation; if flushed, run the tap 2-3 minutes first, then sample.
4. 4. Fill the bottle without touching the inside; cap immediately.
5. 5. Run each test per kit instructions; wait the exact develop/incubation time; read and record every value with units.
6. 6. Record coliform as present/absent after the stated incubation window.
7. 7. Enter all readings, units, GPS, time, and photos into the proof record; sign it.

If it does not match the plan

• Nitrate > 10 mg/L -> tag 'exceeds EPA MCL'; advise no infant consumption pending certified-lab confirmation.
• Total coliform present -> advise disinfection + retest; recommend lab confirmation.
• Arsenic > 10 ppb or Lead > 15 ppb -> tag exceedance; recommend certified-lab confirmation before any consumption guidance.

What counts as done

• GPS waypoint recorded inside the posting radius
• Timestamped photo of the exact sampling point
• Each required analyte recorded with a numeric value + units (or present/absent)
• Sampling type (first-draw vs flushed) explicitly noted

Proof is measured against these, not judged by taste.